Deforestation Why does it occur? 1

Recap Uses of tropical rainforest Uses of Tropical Rainforest Water Catchment Green lungs of the earth Habitat to flora and fauna Habitat to indigenous people Source of timber Medical application 2

Tropical Rainforest What are tropical rainforests? What are the uses of tropical rainforest? What is deforestation? Why does deforestation occur? Where are tropical rainforests found and which areas have been deforested? How does deforestation impact people and the environment? How should we manage deforestation? 3

Lesson Objective Define deforestation With reference to named examples, explain the causes of deforestation 4

What do you observe? 5 What can you infer?

What is deforestation? “It is the cutting down and removal of all or most of the trees in a forested area.” [Pg 86] If it is not managed properly, it can lead to the permanent destruction and eventual disappearance of a once renewable resource. 6

WHY DO YOU THINK DEFORESTATION OCCURS? 7

Causes of deforestation Agricultural activities Pg 94 Cattle ranching Pg 94 8 Logging Pg 95 Mining Pg 95

Explain the causes of deforestation. [8] 1.Agricultural activities [2] Explain how agricultural activities cause deforestation. [1] Large areas of the rainforest are burned and cleared to support large-scale commercial agricultural activities so that there is sufficient food to meet people’s needs. Give an example of agricultural activities that has caused deforestation. [1] For example, about 242,000km 2 of the Amazon rainforest has been converted to soya bean farms by 2010 to process soya beans into products like soya milk and tofu. 9

Explain the causes of deforestation. [8] 1.Agricultural activities [2] Large areas of the rainforest are burned and cleared to support large-scale commercial agricultural activities so that there is sufficient food to meet people’s needs. For example, about 242,000km 2 of the Amazon rainforest has been converted to soya bean farms by 2010 to process soya beans into products like soya milk and tofu. 10

Causes of deforestation 1. Agricultural activities 11

Explain the causes of deforestation. [8] Now you try… 1.Agricultural activities (cite the other example) 2.Cattle ranching 3.Logging 4.Mining 12

However… Though human activities have led to deforestation, it could be a key to development since: The clearing of forests provides land for communities to build houses, factories, offices Roads can be built and this makes trade and transport easier The land can be converted to agricultural land to allow the production of more food 13

Summary Causes of deforestation Agricultural activities Cattle ranching Logging Mining

Homework Workbook activity 3.2 Page 39 Workbook activity 3.5 Pages 47 and 48 Due: Monday 30 th March 15